Finder for photographic cameras.



c. A. HIGH.

FINDER FOR PHOTOGRAPHIC CAMERAS.

APPLICATION FILED-JAN.16, 1918.

1,280,844. Patented Oct 8,1918.

. ATTORNEY To all whoin it may concern:

UNITED STATES PATENT OFFICE.

CHARLES A. RICH, OF NEW YORK, N. Y., ASSIGNOR T ANSCO COMPANY OF BING- HAMTON, NEW YORK, A CORPORATION OF NEW YORK.

.Be it known that I, Cnanuas A. Rica, a

' citizen of the United States, and a resident new and useful Improvement'in Finders for 27 as shown bestin Photographic Cameras, of whichthe following is a specification, reference being had to the accompanying drawings.

It is the purpose of this invention to con,-

struct a finder which shall be relatively inexpensive, unusuall compact in construction, not liable to derangement, and which may be quickly and easily adjusted for vertical or horizontal exposures.

Fi re 1 is a front view of bodymg the invention, the hood being ele vated; Fig. 2 is a side elevation of that which is shown in Fig. 1; Fig.3 is a vertical sectional view of that which'is shown .in Fig. 2, the finder being presented in the opposite direction; Fig. 4 is a plan view of the finder; Fig. 5 is a transverse vertical sectional view taken on the line 5-5 of Fig. i 3 and looking in the direction of the arrows Fig. 6' is a front elevation, showing the parts in the position they occupy during their tilting movement from the vertical to the horizontal position; Fig.- 7 is a vertical sectional view showin the position of the parts when the transition from the vertical to the horizontal position has been accomplished; Fig. 8 is a detail showing the construction of the fixed member of the finder.

In the drawings 1 represents the movable flange 4, and screws or rivets 5. 6 is'thelens in the usual lenscasin 7. 8 is the mirror, 9, the finder lens, 10 t e usual hood. 11, see best Figs. 5,7, and 8, are the two view openings, one for vertical and the other for horizontal exposures, which are or may be made as usual. The movable or oscillating lens and mirror carryingk inner frame is pivotally supported within e fixed outer casing at one side b the main lens casing ig. 3, and at the other side by a pivot or trunnion 12. A yoke like frame 13, having two curved arms 14,14, one at each end, the ends of which respectively engage with the casing for the main a finder em- Specification of Letters Patent.

Application filed January 16, 1918. Serial No. 812,035.

Patented Oct. s, 1918.

lens and .with the. pivot or trunnion 12, is provided in its central part and about midway between the two arms lei, 14, with a .rearwardly extending pin or post15, upon which is arranged a spring 16', which bears aga nst a pin or washer 17 atone end and agalnst the. inner surface of aportion of the fixed frame 2 at theother'end, and the cross member of the yoke 13 is provided with two or more inwardly. extending pins 18, which enter holesin the fixedframe as shown, whereby the yoke is supported. These pins may beneficially 'be bent over at their inner ends (see Fig.6) so as to make them hook like in form 'as shown;

It will be noted thatthe'arm 14 which engages with the ivot or trunnion 12 makes that engagement y meansof a, mere opening or hole made in the end of the arm which properly engages with-thepivot, but, as best seen in Figs. 1, 2 and 6, the. com

panion arm on the opposite side has a bifurcated extremity adapted to enter into an annular groove 19, see Figs. 2 and 3, on the exterior surface. of the casing for the main lens,-so that this'casing may itself act I as the journal or trunnion for that side of I the lens and mirror bearing movable frame.

20 (see Fig. 5) is a slot made in the appropriate side of the fixed frameQ, through which the pivot 12 moves during the tilting movement of the lens bearing frame.

The operation is as follows: In order to effect the transit of the lens bearing frame from say the vertical to the horizontal position, or vice versa, the hood 10 may be taken hold of by the operator and pressed in the appropriate direction,whereupon as thelens and mirror bearing frame tilts under the pressure thusexerted, its upper corners (see Fig.6) bear against the upper plate of the fixed frame 2, and inasmuch as the radius from the axis of the lens to either corner of the movable frame is greater than from the axis of the lens ,to the middle ofeither side, there is of course downward pressure exerted upon the arms 14 of the spring concrossbar, the lower edge of the crossbar be-. ing tilted outwardly from the fixed frame and the spring 16 correspondingly put under stress, and assoon as theupper corner of "the lens bearing frame has passed th'edead point, so to speak, then the pressure exerted by the spring 16,'which causes it to maintain contact with the under side of the horizontal plate of the fixed frame 2, will aid in effecting the transit and will assure its attaining and maintaining its new position, because the spring 16 will continuously exert pressure through the yokeand its arms 14 upon the oscillating mirror and lens carrying frame, causing it to properly maintain either of the'two positions in which it may be moved. The springalso affords desirable cushioning or yielding action during the stated-movements, so that there is no objectionable binding of one part upon the other.

It will be obvious to those who are fa-' miliar with such matters that modifications may be made in the details of construction without departing from the essentials of the invention. I therefore do not limit myself to such details.

I claim: v

1. A finder for cameras embodying a fixed I outer frame provided with requisite view openings,a movable lens and mirror bearing frame within the fixed frame, and a spring actuated yoke-supported by the fixed frame and which pivotall supports and controls the movements of t e inner movable frame.

2. A finder for cameras embodying a fixed outer frame provided with requisite view openings, a movable lens and mirror bearing frame within the fixed frame, a yoke supported upon the fixed frame and which pivotally supports the inner movable frame. said yoke being provided with a spring whereby it is held in osition and pressure exerted on the movab e frame through the pivotal connections between the yoke and it during the movements of the movable frame.

3. In a finder a fixed outer frame provided with requisite view openings, a movable inner lens and mirror bearingframe, a yoke exterior to both frames which pivotally supports the inner frame, and a spring 1 inner frame, a yoke comprising a cross-bar havin a laterally extendin arm at each end w ich pivotally support t e inner frame means on the cross-bar whereby the yoke is supported uponthe fixed frame and a sprin which exerts its tension on the yoke and tends to hold it to the fixed frame and to aid in the movements of the inner frame.

In testimony whereof I have signed my name to this specification. v

' CHARLES A. 121011.. 

